Astronomy Unit 2 and 3 Vocab

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Across
  1. 2. A highly luminous star that is larger and more massive than a giant
  2. 4. Bright cores of galaxies that have a black hole at the center consuming the matter
  3. 6. a developing star where no nuclear fusion is happening yet
  4. 7. an astronomical distance equal to the distance light can travel in one year, 6.5 Trillion Miles
  5. 10. how much light is actually given off by a star
  6. 11. galaxy that looks normal to the naked eye, but emit more infrared radiation than a normal galaxy
  7. 12. Hydrogen becomes helium in a continuous nuclear reaction
  8. 13. a celestial body composed of hot gasses that radiate energy, including light and heat
  9. 14. a small, dense, hot, faint star
  10. 16. The band of colors produced when light passes through a prism that splits white light into its separate components
  11. 17. a graphical plot that shows the relationship between a star’s luminosity and surface temperature
  12. 18. clouds of dust and gas
Down
  1. 1. a star that is in the stable middle stage of development
  2. 2. produce their own light
  3. 3. a high luminous, exceptionally massive star
  4. 5. how bright a star appears to be from earth due to its distance
  5. 8. a cluster of billions of stars held together by gravity
  6. 9. the mass of our sun
  7. 15. galaxy that emits radio wavelengths instead of light so they are driven by non-thermal emissions